Hi, I am developing an iterative solver for Navier-Stoke equations with CVFEM using a preconditioned BiCGSTAB solver. Has anyone tried an ILU preconditioner within this context before?

Emmanuel

Hi, Emmanuel...

The Krylov subspace method is a good choice, I think... but the other method... for example, the muitigrid method can give you more fast convergence.

- I had developed preconditioned BiCGSTAB solvers with severel precontioners.

- In my experiment, Jacobi, SSOR, IC, ILU and MILU were used as preconditioner. 'MILU' preconditioner is the best among them.

- whether your solver is coupled or not your strategy can be different.

- GMRES(m) with MILU preconditioner gave me 1.78 times faster than BiCGSTAB with MILU precontitioner in the driven cavity problem. The Segregated algorithm was used and 128*128 grids were used...

- Good Luck !!!

Hi, Angela, Thanks for this information. Emmanuel